Of the dukes who signed the peace treaty, only four are mentioned in other written sources: Mindaugas, who went on to become the Grand Duke of Lithuania and was crowned as King of Lithuania in 1253, Vykintas, leader of anti-Mindaugas coalition during the civil war in 1248–1251, Bikšys and Ligeikis, both identified as Mindaugas relatives and nobles, mentioned in a document, dated 1260 and sometimes considered a forgery.[6][7]